Fire retardant phosphate coating. Phosphate fire retardant coating on steel
PHOSPHATE FIRE-RESISTANT COATING ON STEEL
TECHNICAL REQUIREMENTS
GOST 23791-79
| STATE STANDARD OF THE USSR UNION | |
| COATING ON STEEL | |
| PHOSPHATE FIRE RETARDANT | GOST 23791-79 |
| Technical requirements | |
| Phosphates fire protective still coating. | |
| Technical requirements |
By Decree of the USSR State Committee for Construction Affairs dated July 27, 1979 No. 129, the introduction date was established
from 01/01/1980
Failure to comply with the standard is punishable by law
This standard applies to phosphate fire retardant coatings on steel applied at a factory or construction site to steel structures to improve their fire resistance.
The standard establishes the basic requirements for the coating, components for its preparation and application technology.
1. COATING REQUIREMENTS
1.1. The coating should be used for fire protection steel structures, operated indoors with a non-aggressive environment and a relative air humidity of no more than 75%.
1.2. The coating must be applied in one layer in accordance with the requirements given in the mandatory application. Finishing of the coating with paints and varnishes is allowed.
1.3. The fire resistance limits of steel structures depending on the thickness of the coating layer are given in Table. 1.
Table 1
1.4. The maximum deviation of the thickness of the applied layer from the design one should not exceed ± 5%.
1.5. The coating should not have cracks, peeling, or swelling.
1.6. The main physical and mechanical characteristics of the coating must correspond to those given in table. 2.
table 2
1.7. Coated structures must be transported in accordance with the requirements of the SNiP chapter on the organization of construction production.
1.8. After coating, structures must be stored in dry rooms.
1.9. When transporting and storing structures at a relative air humidity of more than 75%, waterproofing should be applied to the surface of the coating (see clause 3.7 of the mandatory annex).
1.10. The coating consists of the following components: asbestos, liquid glass and nepheline fire retardant.
1.11. The consumption of components per 1 m 3 of coating, taking into account 10% of production losses, is given in table. 3.
Table 3
1.12. The coating component is chrysotile asbestos III-V semi-rigid grades P-3-50, P-3-70, P-5-50 and P-5-65 according to GOST 12871-83. The humidity of asbestos should not exceed 2%.
1.13. The coating component is potassium liquid glass with a module of 2.6-2.8 according to normative and technical documentation approved in the prescribed manner, or sodium liquid glass with a module of 2.6-2.8 in accordance with GOST 13078-81.
1.14. The coating component is nepheline flame retardant in the form of a fine powder according to the regulatory and technical documentation approved in in the prescribed manner. The residue on sieve No. 018 according to GOST 3584-73 should be no more than 7%.
1.15. Coating components must be supplied in metal barrels, plastic or paper bags and stored in accordance with the requirements of regulatory and technical documentation approved in the prescribed manner
2. COATING QUALITY CONTROL
2.1. Finished coating shall be checked for compliance with the requirements of this standard and accepted by the department technical control manufacturer of structures.
When applying coating at a construction site, the work is accepted by the customer organization and formalized in a free-form document.
2.2. Coating acceptance is carried out in batches. Up to 1000 m2 of protected surface of metal structures is accepted as a batch.
2.3. Upon acceptance, a control check is carried out appearance coating, its thickness, bulk density and compressive strength.
2.4. A control check of the appearance of the coating (clause 1.15) is carried out for each structure.
2.5. If, when checking the appearance, it turns out that more than 10% of the structures do not meet the requirements of clause 1.5, then the batch is not subject to acceptance.
2.6. At least five structures from each batch must be checked for coating thickness. The measurement is carried out using a caliper in accordance with GOST 166-73. The result is taken as the arithmetic mean of five measurements.
2.7. The compressive strength and bulk density of the coating are determined according to GOST 17177-71. To determine the compressive strength and bulk density of the coating, samples are taken from three designs of each batch. The result is taken as the arithmetic mean of three measurements.
2.8. If the results are unsatisfactory according to one of the indicators specified in paragraphs. 1.4 and 1.6, the batch is not subject to acceptance.
APPLICATION
Mandatory
PREPARATION AND APPLICATION OF COATING COMPOSITION
1. Materials
1.1. Materials used for coating must meet the requirements of paragraphs. 1.12-1.14 of this standard.
2. Preparation of the coating composition
2.1. Preparation of dry mixture
Asbestos and nepheline fire retardant are weighed on weighing scales with an error of ± 1% by weight and mixed in a continuous mixer.
Mixing time - at least 5 minutes.
2.2. Liquid glass is diluted hot water temperature no more than 80 ° C with constant stirring for at least 3 minutes until density = 1.2 g/cm 3 .
It is allowed to dilute liquid glass with cold water at a temperature of (20 ± 5) ° C, provided that the mixing time is increased to 10 minutes.
2.3. The diluted liquid glass is filtered through sieve No. 05 according to GOST 3584-73.
The dry mixture and liquid glass are loaded into appropriate aerodynamic containers.
3.1. 3. Application of the coating composition
3.2. The application of the coating composition must be carried out at the manufacturer of metal structures or by a specialized organization directly at the construction site.
3.3. The composition is applied to steel structures primed with red lead according to GOST 8135-74 or GF type primers - according to TU 610-1642-77 or GOST 12707-77 in accordance with the requirements of SNiP for the design of protection of steel structures from corrosion.
The surface of the structure is moistened with liquid glass with a density = 1.2 g/cm 3, after which the composition (dry mixture and liquid glass) of the required thickness is applied by spraying at a time using an aerodynamic installation under the following operating modes: pressure compressed air
0.3 MPa (3 kgf/cm 2)
liquid glass outlet pressure
from a gun 0.25 MPa (2.5 kgf/cm 2)
jets of composition upward no more than 500 mm
distance from spray gun to
protected surface when directed
jets of composition in the horizontal direction
and downwards no more than 700 mm
3.4. In hard-to-reach places, the specified distances can be reduced to 200 mm.
3.5. When applying the coating composition to structures, the requirements of SNiP for finishing coatings of building structures must also be observed; the finishing of the coating surface must be carried out in accordance with the design. When applying the coating composition, the ambient temperature must be no lower than 5 ° C, air humidity should not be higher than 75%, in addition, in conditions construction site
3.6. structures must be protected from precipitation.
Drying of the coating should be carried out in natural conditions at an ambient temperature of not lower than 5 ° C and humidity not higher than 75% for at least 48 hours.
3.7. Pentaphthalic enamel PF-115 in accordance with GOST 6465-76 or chemically resistant enamel XC-534 in accordance with TU 6-10-801-76 can be applied to the dried coating as waterproofing or finishing, if provided for by the project. The enamel is applied in two layers using a pneumatic paint sprayer at a compressed air pressure of up to 5 kgf/cm 2 .
It is allowed to apply the enamel with a roller in accordance with GOST 10831-80 in two layers.
The application and drying of enamel is carried out in accordance with the regulatory and technical documentation approved in accordance with the established procedure for these types of enamel.
3.8. Coatings damaged during application, transportation or installation must be repaired in accordance with the requirements of this standard.
4. Control methods
4.1. During operational control, the humidity of asbestos, the density of liquid glass, the fineness of grinding of the fire retardant, as well as application parameters (compressed air pressure, pressure of liquid glass at the outlet of the gun, the distance from the spray gun to the protected surface) are checked.
4.2. The humidity of asbestos is determined according to GOST 17177.4-81.
4.3. The density of liquid glass is determined using a hydrometer according to GOST 18481-81.
4.4. The fineness of fire retardant grinding is determined according to GOST 310.2-76.
4.5. The pressure of compressed air and the pressure of liquid glass at the outlet of the gun is controlled using a pressure gauge in accordance with GOST 8625-77.
5. Safety precautions
5.1. The work site must be equipped with supply and exhaust ventilation.
5.2. Persons producing coating, must be provided with funds personal protection: rubber gloves, respirators, safety glasses and thick overalls.
DEVELOPED by the USSR State Committee for Construction Affairs
PERFORMERS
V.A. Kopeikin, Dr. Tech. Sciences (topic leader); V.S. Sorin, Ph.D. tech. sciences; L. A. Lukatskaya, Ph.D. tech. sciences; L.A. Boykova; N.F. Ph.D. tech. sciences; Vasilyeva,
I.R. Ladygina
INTRODUCED by the USSR State Committee for Construction Affairs Member of the Board
IN AND. Sychev
GOST 23791-79
APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Construction Affairs dated July 27, 1979 No. 129
STATE STANDARD OF THE USSR UNION
UDC 614.841.332:620.197.6:006.354 Group Zh15
Coating on steel
phosphate fire retardant
Technical requirements
Phosphate fire protective coating for
steel constructions. Technical requirements
Date of introduction 1980-01-01
APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Construction Affairs dated July 27, 1979 No. 129
This standard applies to phosphate fire retardant coatings on steel applied at a factory or construction site to steel structures to improve their fire resistance.
The standard establishes the basic requirements for the coating, components for its preparation and application technology.
1. COATING REQUIREMENTS
1.1. The coating should be used for fire protection of steel structures used indoors in a non-aggressive environment and a relative air humidity of no more than 75%.
1.2. The coating must be applied in one layer in accordance with the requirements given in the mandatory application. Finishing of the coating with paints and varnishes is allowed.
1.3. The fire resistance limits of steel structures depending on the thickness of the coating layer are given in Table. 1.
Table 1
1.4. The maximum deviation of the thickness of the applied layer from the design one should not exceed 5%.
1.5. The coating should not have cracks, peeling, or swelling.
1.6. The main physical and mechanical characteristics of the coating must correspond to those given in table. 2.
table 2
1.7. Coated structures must be transported in accordance with the requirements of the SNiP chapter on the organization of construction production.
1.8. After coating, structures must be stored in dry rooms.
1.9. When transporting and storing structures at a relative air humidity of more than 75%, waterproofing should be applied to the surface of the coating (see clause 3.7 of the mandatory annex).
1.10. The coating consists of the following components: asbestos, liquid glass and nepheline fire retardant.
1.11. The consumption of components for 1 coating, taking into account 10% of production losses, is given in table. 3.
Table 3
1.12. The coating component is chrysotile asbestos III-V semi-rigid grades P-3-50, P-3-70, P-5-50 and P-5-65 according to GOST 12871-83.
The humidity of asbestos should not exceed 2%.
1.13. The coating component is potassium liquid glass with a module of 2.6-2.8 according to normative and technical documentation approved in the prescribed manner, or sodium liquid glass with a module of 2.6-2.8 in accordance with GOST 13078-81.
1.14. The coating component is nepheline flame retardant in the form of a fine powder according to the regulatory and technical documentation approved in the prescribed manner. The residue on sieve No. 018 according to GOST 3584-73 should be no more than 7%.
1.15. Coating components must be supplied in metal barrels, plastic or paper bags and stored in accordance with the requirements of regulatory and technical documentation approved in the prescribed manner
2.1. The finished coating must be checked for compliance with the requirements of this standard and those adopted by the technical control department of the structure manufacturer.
When applying coating at a construction site, the work is accepted by the customer organization and formalized in a free-form document.
2.2. Coating acceptance is carried out in batches. Up to 1000 protected surfaces of metal structures are accepted per batch.
2.3. Upon acceptance, a control check is carried out on the appearance of the coating, its thickness, bulk density and compressive strength.
2.4. A control check of the appearance of the coating (clause 1.15) is carried out for each structure.
2.5. If, when checking the appearance, it turns out that more than 10% of the structures do not meet the requirements of clause 1.5, then the batch is not subject to acceptance.
2.6. At least five structures from each batch must be checked for coating thickness. The measurement is carried out using a caliper in accordance with GOST 166-73. The result is taken as the arithmetic mean of five measurements.
2.7. The compressive strength and bulk density of the coating are determined according to GOST 17177-71. To determine the compressive strength and bulk density of the coating, samples are taken from three designs of each batch. The result is taken as the arithmetic mean of three measurements.
2.8. If the results are unsatisfactory according to one of the indicators specified in paragraphs. 1.4 and 1.6, the batch is not subject to acceptance.
APPLICATION
Mandatory
PREPARATION AND APPLICATION OF COATING COMPOSITION
1. Materials
1.1. Materials used for coating must meet the requirements of paragraphs. 1.12-1.14 of this standard.
2.1. Preparation of dry mixture
Asbestos and nepheline fire retardant are weighed on weighing scales with an error of 1% by weight and mixed in a continuous mixer.
Mixing time - at least 5 minutes.
2.2. Liquid glass is diluted with hot water at a temperature of no more than 80 ° C with constant stirring for at least 3 minutes to a density of = 1.2.
It is allowed to dilute liquid glass cold water temperature (205) °C, subject to increasing the stirring time to 10 minutes. The diluted liquid glass is filtered through sieve No. 05 according to GOST 3584-73.
2.3. The dry mixture and liquid glass are loaded into appropriate aerodynamic containers.
3.1. The application of the coating composition must be carried out at the manufacturer of metal structures or by a specialized organization directly at the construction site.
3.2. The composition is applied to steel structures primed with red lead according to GOST 8135-74 or GF type primers - according to TU 610-1642-77 or GOST 12707-77 in accordance with the requirements of SNiP for the design of protection of steel structures from corrosion.
3.3. The surface of the structure is moistened with liquid glass with a density = 1.2, after which the composition (dry mixture and liquid glass) of the required thickness is applied by spraying at a time using an aerodynamic installation under the following operating modes:
compressed air pressure...................0.3 MPa (3)
pressure of liquid glass at the outlet of the gun...............0.25 MPa (2.5)
distance from the spray gun to the protected surface when the composition jet is directed upwards....................................no more than 500 mm
distance from the spray gun to the protected surface when the composition jet is directed horizontally and downwards................................... .......no more than 700 mm
In hard-to-reach places, the specified distances can be reduced to 200 mm.
3.4. When applying the coating composition to structures, you should also comply with the requirements of SNiP for finishing coatings building structures, finishing of the surface of the coating must be carried out in accordance with the design.
3.5. When applying the coating composition, the ambient temperature must be no lower than 5 ° C, air humidity no higher than 75%, in addition, in the conditions of the construction site, the structures must be protected from precipitation.
3.6. Drying of the coating should be carried out in natural conditions at an ambient temperature of not lower than 5 ° C and humidity not higher than 75% for at least 48 hours.
Drying is allowed at a temperature of 80-100 ° C for at least 5 hours.
3.7. Pentaphthalic enamel PF-115 in accordance with GOST 6465-76 or chemically resistant enamel XC-534 in accordance with TU 6-10-801-76 can be applied to the dried coating as waterproofing or finishing, if provided for by the project. The enamel is applied in two layers using a pneumatic paint sprayer at a compressed air pressure of up to 0.5 MPa (5).
It is allowed to apply the enamel with a roller in accordance with GOST 10831-80 in two layers.
The application and drying of enamel is carried out in accordance with the regulatory and technical documentation approved in accordance with the established procedure for these types of enamel.
3.8. Coatings damaged during application, transportation or installation must be repaired in accordance with the requirements of this standard.
4. Control methods
4.1. During operational control, the humidity of asbestos, the density of liquid glass, the fineness of grinding of the fire retardant, as well as application parameters (compressed air pressure, pressure of liquid glass at the outlet of the gun, the distance from the spray gun to the protected surface) are checked.
4.2. The humidity of asbestos is determined according to GOST 17177.4-81.
4.3. The density of liquid glass is determined using a hydrometer according to GOST 18481-81.
4.4. The fineness of fire retardant grinding is determined according to GOST 310.2-76.
4.5. The pressure of compressed air and the pressure of liquid glass at the outlet of the gun is controlled using a pressure gauge in accordance with GOST 8625-77.
5. Safety precautions
5.1. The work site must be equipped with supply and exhaust ventilation.
5.2. Persons applying the coating must be provided with personal protective equipment: rubber gloves, respirators, safety glasses and tight overalls.
1. COATING REQUIREMENTS
2. COATING QUALITY CONTROL
APPENDIX (required). PREPARATION AND APPLICATION OF COATING COMPOSITION
1. Materials
2. Preparation of the coating composition
3. Application of the coating composition
4. Control methods
5. Safety precautions
GOST 25665-83
USSR STATE COMMITTEE FOR CONSTRUCTION
Moscow
APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Construction Affairs dated February 21, 1983 No. 29.
STATE STANDARD OF THE USSR UNION
Failure to comply with the standard is punishable by law
This standard applies to mineral fiber-based phosphate fire retardant coating applied on site to steel structures to improve their fire resistance.
The standard establishes the basic requirements for the coating, materials for its preparation and application technology.
1. COATING REQUIREMENTS
1.1. The coating should be used for fire protection of structures operated indoors with a non-aggressive environment and relative air humidity of no more than 75%.
1.2. The materials for preparing the coating composition, as well as the technology for applying it to structures, must meet the requirements given in the mandatory annex.
1.3. The fire resistance limits of steel structures depending on the thickness of the coating layer are given in Table. 1.
Table 1
1.4. The maximum deviation of the thickness of the applied coating layer from the design one in the direction of reduction should not exceed 5%.
1.5. The coating should not have cracks, peeling, or swelling.
1.7. The coating consists of the following components: granulated mineral fiber, liquid glass and nepheline fire retardant.
1.8. The consumption of components per 1 m 3 of coating, taking into account production losses, is given in table. 3.
1.9. The coating component is granulated mineral fiber, manufactured in accordance with clause 2.2 of the mandatory annex to this standard, with a moisture content of no more than 2%.
1.10. The coating component is potassium liquid glass with a module of 2.6-2.8 according to normative and technical documentation approved in the prescribed manner, or sodium liquid glass with a module of 2.6-2.8 in accordance with GOST 13078-81.
1.11. The coating component is nepheline flame retardant in the form of a fine powder according to the regulatory and technical documentation approved in the prescribed manner.
1.12. The coating components must be supplied: liquid glass - in metal barrels, mineral fiber and fire retardant - in plastic or paper bags, and stored in accordance with the requirements of regulatory and technical documentation approved in the prescribed manner.
2. COATING QUALITY CONTROL
2.1. The finished coating must be tested to ensure compliance with the requirements of this standard. Acceptance of work is carried out by the customer organization and is documented in a free-form act.
2.2. Coating acceptance is carried out in batches. Up to 1000 m2 of protected surface of metal structures is accepted as a batch.
2.3. Upon acceptance, a control check is made of the appearance of the coating, its thickness, density and compressive strength.
2.4. A control check of the appearance of the coating (clause 1.5) is carried out over the entire area of the lot.
2.5. If, when checking the appearance, it turns out that more than 10% of the lot area does not meet the requirements of clause 1.5 of this standard, then the lot is not subject to acceptance.
2.6. The coating thickness (clause 1.4) must be checked at at least 50 dispersed points of each batch. The measurement is made using a caliper in accordance with GOST 166-80.
2.7. The compressive strength and coating density (clause 1.6) are determined according to GOST 17177-71. To determine the compressive strength and density of the coating, samples are taken from three dispersed locations in each batch. The result is taken as the arithmetic mean of three measurements.
2.8. If the results are unsatisfactory in at least one of the indicators specified in paragraphs. 1.4 and 1.6, the batch is not subject to acceptance.
APPLICATION
Mandatory
PREPARATION AND APPLICATION OF COATING
1. MATERIALS
1.1. Materials that are components of the coating must meet the requirements of paragraphs. 1.9-1.11 of this standard.
2. PREPARATION OF THE COATING COMPOSITION
2.1. Preparation of the coating composition should consist of the following operations:
preparation of granulated mineral fiber;
preparation of dry mixture;
preparation of liquid glass.
2.2. Preparation of granulated mineral fiber is carried out by mixing mineral fiber in accordance with GOST 4640-76 in a paddle mixer type SM-447 of any capacity for 3 - 5 minutes.
Granulated mineral fiber must be sifted through sieve No. 2, 6 according to GOST 2715-75 to separate it from dust and beads.
The fractional composition of granulated mineral fiber must correspond to the following:
2.3. Preparation of the dry mixture is carried out by mixing granulated mineral fiber and nepheline fire retardant, pre-weighed on weighing dispensers with an error of ±1% by weight, in a continuous mixer.
Mixing time - at least 5 minutes.
2.4. The preparation of liquid glass involves diluting it with hot water at a temperature of no more than 80 °C with constant stirring for at least 3 minutes to a density of 1.2 g/cm 3 .
It is allowed to dilute liquid glass with cold water at a temperature of (20 ± 5) °C, provided that the stirring time is increased to 10 minutes.
The diluted liquid glass is filtered through sieve No. 5 according to GOST 3187-76.
2.5. The dry mixture and liquid glass are loaded into the appropriate containers of the UNOP-1M installation, from which they are supplied under compressed air pressure to the spray gun and mixed aerobically when applied to the protected surface.
3. APPLICATION OF COATING COMPOSITION
3.1. The application of the coating composition must be carried out by a specialized organization directly at the construction site.
3.2. The composition is applied to steel structures primed with red lead according to GOST 8135-74 or GF type soils according to GOST 12707-77 in accordance with the requirements of the codes and regulations for the design of protection of building structures from corrosion.
3.3. Before applying the coating composition, the surface of the structure is wetted with liquid glass with a density of 1.2 g/cm 3 using the UNOP-1M installation.
3.4. The coating composition is applied to the prepared surface of the structure in one step of the required thickness using the UNOP-1M installation under the following operating modes:
In hard-to-reach places, the specified distances can be reduced to 200 mm.
3.4. When applying the coating composition to structures, the requirements must be observed building codes and rules for finishing coatings of building structures. The coating surface must be finished in accordance with the design.
3.5. When applying the coating, the ambient temperature must not be lower than 5 °C, and the air humidity must not be higher than 75%. Structures must be protected from precipitation.
3.6. Drying of the coating must be carried out in natural conditions at an ambient temperature of not lower than 5 ° C and humidity not higher than 75% for at least 36 hours for a coating thickness of up to 30 mm and for at least 48 hours for a coating thickness of more than 30 mm.
3.7. Any of the pentaphthalic enamels of grades PF-115 according to GOST 4665-76, PF-218 according to GOST 21227-75, PF-223 according to GOST 14923-78 or enamel should be applied to the dried coating as a finishing, if provided for by the project XC-534 according to regulatory and technical documentation. The enamel is applied in two layers using a spray gun in accordance with GOST 20233-74.
It is allowed to apply the enamel with a roller in accordance with GOST 10831-80 in two layers.
The application and drying of enamel is carried out in accordance with the regulatory and technical documentation, approved in accordance with the established procedure, for these types of enamel.
3.8. The coating damaged during the work must be restored in accordance with the requirements of this standard.
4. CONTROL METHODS
4.1. During operational control, the moisture content of the mineral fiber, its granulometric composition, the density of the glass, as well as application parameters (compressed air pressure, pressure of liquid glass at the outlet of the gun, distance from the spray gun to the protected surface) are checked.
4.2. The moisture content of mineral fiber is determined according to GOST 17177-71.
4.3. The density of liquid glass is determined using a hydrometer according to GOST 18481-81.
4.4. The pressure of compressed air and the pressure of liquid glass at the outlet of the gun are controlled using a pressure gauge in accordance with GOST 8625-77.
5. SAFETY REQUIREMENTS
5.1. When performing work on applying the coating composition, you should be guided by the requirements of the chapter of building codes and regulations on safety precautions in construction and this standard.
5.2. Persons carrying out work on the preparation and application of the coating composition must be provided with personal protective equipment: protective pastes and ointments, rubber gloves, respirators, safety glasses and tight overalls.
5.3. When working with equipment intended for preparing and applying the coating composition, it is necessary to comply with the safety requirements specified in the operating instructions for this equipment.
STATE STANDARD OF THE USSR UNION
COATING ON STEEL
PHOSPHATE FIRE RETARDANT
TECHNICAL REQUIREMENTS
GOST 23791-79
STATE COMMITTEE OF THE USSR
ON CONSTRUCTION AFFAIRS
Moscow
DEVELOPED by the USSR State Committee for Construction Affairs
PERFORMERS
V.A. Kopeikin,Dr. Tech. Sciences (topic leader); V.S. Sorin, Ph.D. tech. sciences; L. A. Lukatskaya, Ph.D. tech. sciences; L.A. Boykova; N.F. Vasilyeva, Ph.D. tech. sciences; Vasilyeva,
INTRODUCED by the USSR State Committee for Construction Affairs
INTRODUCED by the USSR State Committee for Construction Affairs Member of the Board
APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Construction Affairs dated July 27, 1979 No. 129
STATE STANDARD OF THE USSR UNION
|
COATING ON STEEL Technicalrequirements Phosphates fire protective still coating. |
GOST |
|
By Decree of the USSR State Committee for Construction Affairs dated July 27, 1979 No. 129, the introduction date was established from 01.01. 1980 |
|
Failure to comply with the standard is punishable by law
This standard applies to phosphate fire retardant coatings on steel applied at a factory or construction site to steel structures to improve their fire resistance.
The standard establishes the basic requirements for the coating, components for its preparation and application technology.
1. COATING REQUIREMENTS
1.1. The coating should be used for fire protection of steel structures used indoors in a non-aggressive environment and a relative air humidity of no more than 75%.
1.2. The coating must be applied in one layer in accordance with the requirements given in the mandatory. Finishing of the coating with paints and varnishes is allowed.
1.3. The fire resistance limits of steel structures depending on the thickness of the coating layer are given in.
|
Thickness fire retardant coating, mm |
Fire resistance limit of structures, not less, h |
||||||||||||||
1.7. Coated structures must be transported in accordance with the requirements of the chapter on the organization of construction production. 1.8. After coating, structures must be stored in dry rooms. 1.9. When transporting and storing structures at a relative air humidity of more than 75%, waterproofing should be applied to the surface of the coating (see mandatory appendix). 1.10. The coating consists of the following components: asbestos, liquid glass and nepheline fire retardant. 1.11. The consumption of components per 1 m 3 of coating, taking into account 10% production losses, is given in.
|